AliB firmware loading

I use to load firms on my FTE AliB, but no firmware loads anymore.
I use to use Alimupg5.1. I tried also to load cas data with no success.
I'm using an RS232 cable (USB).
The firmware appears to load properly, but when I go to info it's always showing the same old date for update (18/10/2009).
Is the procedure different now?
Please help